Plotinos: Complete Works, v. 1 In Chronological Order,...

Which then is the principle that acts, that thinks, and what is the actualization and thought of Intelligence, necessary to justify the assertion that it is what it thinks? Evidently Intelligence, by its mere real existence, thinks beings, and makes them exist; it therefore is the beings. Indeed, the beings will either exist outside of it, or within it; and in the latter case they would have to be identical with it. That they should exist outside of Intelligence, is unthinkable; for where would they be located? They must therefore exist within it, and be identical with it. They could not be in sense-objects, as common people think, because sense-objects could not be the first in any genus. The form which inheres in their matter is only the representation of existence; now a form which exists in anything other than itself is put in it by a superior principle, and is its image. Further, if Intelligence must be the creative power of the universe, it could not, while creating the universe, think beings as existent in what does not yet exist. Intelligible entities, therefore, must exist before the world, and cannot be images of sense-objects, being on the contrary, their archetypes, and constituting the "being" of Intelligence. It might be objected that the (seminal) reasons might suffice. These reasons are, no doubt, eternal; and, if they be eternal and impassible, they must exist within the Intelligence whose characteristics we have described, the Intelligence which precedes the "habit,"122 nature,123 and the soul,124 because here these entities are potential.125